Infinite colorless manaInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite mana creatures you control can produceInfinite creature sacrifice triggersInfinite untap of creatures
How it works
Cast Su-Chi Cave Guard by paying 8.
Holding priority, activate Drafna's second ability by paying 3 and tapping it, copying the Su-Chi Cave Guard spell.
Resolve the copy of the Su-Chi Cave Guard spell.
When the Su-Chi Cave Guard token enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Activate Krark-Clan Ironworks by sacrificing the Su-Chi Cave Guard token, adding CC.
When the token Su-Chi Cave Guard dies, it triggers, adding eight C.
Repeat from step 2.
This clever loop spins up an endless engine by duplicating a massive artifact creature as it enters the stack. With Drafna, Founder of Lat-Nam copying your spell and Krark-Clan Ironworks sacrificing the resulting token for mana, you get a powerful feedback loop where Su-Chi Cave Guard's death trigger replaces and multiplies your resources. Meanwhile, Intruder Alarm watches the battlefield and untaps Drafna every single time a new token arrives, ensuring you can keep paying for the duplication over and over again.